Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4549d2c8620c1166d55d1189fcb24c8f141d70a1e0b4109123b17ac0d0a7e139' 
  AND token = 'yMD4PnNi7C/I1uj7NY+T8se5qwpavnYPKoPvWPSowoU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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