Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '82f41ef3f8f4cf139b5e54edd73811e26538d883451b9a4ce6a61d87565e2317' 
  AND token = 'uuXDHsnT4oDCcUNmM0cgqBX5bInJ71Nm3HOLMan/RyY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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