Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '515968fe9cec3f3c66a0aaeb1406e5424de86826d1d5b2b766824b7504d94a9a' 
  AND token = 'kk5FQFqlAmbbnoYv5HQpsSOLmUkpJrquj/nEvK9I/g4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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