Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb361146b42a6b4255d941b330f39dd4ec2434a0e0b944ba547fe4a0b35a8acd' 
  AND token = 'YqOBxJZkSlXS7vA0uxis0BAwpRXYAvsEklxcRL4eL7k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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