Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3589415eadac0f96ad3ef870c2909eb2aa7a766f69db9d6f6b7a29f000cad31' 
  AND token = 'qcuCfgL5qNjaKM110qARsN8wTztMceIho+sbquJoy4E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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