Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd397fa096ec168730bc63e1f7aad31169621fbc8a9afd3e349bf91d313398c09' 
  AND token = '2a/RSqvOH63TVW70t+7FiN4wXtQeBjTq7hQc2ugvWrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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