Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f849d2c0b938bfd626c656c859383a80896b0697d0716482afa8b7987d70eb4' 
  AND token = 'CSXYmuCAItbgwrbo6Pox6v76iQCsCe4N4msX0Y0f5OU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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