Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1e6bbb64262a4cb77d7456001bf2edb9169d01e0cbc0f8f04cf13b673f1db40' 
  AND token = '5/X625zVBa+zeelhuwxkGY5+slBJ1anfyTfHc3k0sBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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