Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '91dccc92440ad261b1d47504f9fa5f2b2f9f59b2bad70b3e7b2292c07efac4ef' 
  AND token = 'yllYEcY1TLnb3pRaexQ+Yx4upQwJP86TmaxRH9WCE00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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