Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5652917b8a0819c31ce1ff4714092f6f990320690cb5e70aa88a4acb0fb1f47d' 
  AND token = 'M6FgFAQtB7jlBLbJIFoEdBRZy7P6uc04Zofu0uhDkTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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