Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0b8147249a0651a54b9267b7663a816852142d57fddfdd38eb7059b8930e491' 
  AND token = 'xbbL1unjCseqyZ61NeeCJ0YZOCikVCsbmN0FUI9lDtU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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