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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '179d2ea5f1a5c2106e8a04953ebd1d62c8452f16082e21abc4ac4085e66ea18e' 
  AND token = 'FoKM3NwJF/jl4We+493IrAj/Rn4n6Ti/eilO1ag+yM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}