Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75fa773409fa8f29c1281e393a5539852c5b2bb45b52e87cf32eaf86e83f2d43' 
  AND token = '9FFWSYVoN4tPyYQbNEO+zyTtpWuSglL10+cqOwAinaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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