Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a81f547e927f64490806fb90308e33a53c33452f72a69afd17c0663bb0f0074' 
  AND token = '/ekYaw1LhfyVMFsuUMmoNWbmdTAxA1Dm9A63SiXSWcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}