Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fb50716cd6a239ae313a4d9edf849550263d8593e1bcee80058f225bf134ab2' 
  AND token = 'i5/9L/KsKvs+na4zJ4tEwvx8lkfXsVDMIcFEjd8UgM4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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