SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a85a3f4c48d063784cbe17675c79ad056a5d5f8db9f64db03eb683b18347f5ca' 
  AND token = '+jlpYriXOSgG9wzezjdTSWGwars0JBmvRL8Zr+T0fhM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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