Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '949a535577ced27ad1ee5c09c7dbfa93c024c0f2050d37cde2f6cc11fec7b62d' 
  AND token = 'kTSrULyC5036rWDwXbYM8Uche8iyyhImH3UWPAolmYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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