Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb267d195f0fdb032232b3902d3d621693a66eff84c6c39f3833e02955ad49ce' 
  AND token = 'abFOL1T2RaRgd8qoaG4/Cjlk7jNM7fg1P9BbAuijZ80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00088

JSON explain

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