Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '874ce47f3a34c503f218388a61282935bed1b8b2c91ca83c87c80a00995a1756' 
  AND token = 'mnANQ9rxxg3zZt0fWxdX0ZN1qpXOm17iYVWGqh26qqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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