Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd1e0ee39b39c3189712df45c76204738dadb00249ce4499bd2878ade9de3f395' 
  AND token = 'UoWKmkXpiJuw/1W26tkv/gUnDdXM6xISOLFTMXm2r/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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