Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '042f052f01add72f16f95b2993fe03c126630f39b36cec0a9568bbff4f833697' 
  AND token = 'ouK40f63rHfmYIA18Pf9xQDgO/mZ/huWgKz06kgeQeo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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