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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11919715564172f6f045c3469e9494e1b2beb834ff59273199a18bdffce9c99d' 
  AND token = 'oj3oIMc7IeJz2R6aL+obo+Bp0gCiFIE8Y60Ze1fl7Rs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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