Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f31eb8ac8f526cdd798fa7d3114077e04a41188a129693814e16aa56458f945f' 
  AND token = 'Y5a2Qj3ihpUIA9PaG03ZVW0Oa6bWsdpkFgGrGh5+Ato=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00079

JSON explain

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