Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4bb62f2131313f2513f52ec3d934966685781b0948e1964904faea7e07f426b' 
  AND token = 'CesSP/xxSopLCIUqjaLFg8rk3pWoaQXdK65l3UWs22Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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