Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2398f62918355e2b99390b71ac1d0ccd41569854a699d88a3a2443c93dce6155' 
  AND token = 'WG0pqrSJ+NY0Hm6kmd1BVmOWKBctBMX1X1sJ6MvtIPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}