Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d1f37e1fc31583679d405df39e09a3dba46842896c9cf89fb944b2cbb372062' 
  AND token = 'vqA3Jb9/tjMAT79LcCKLdMGajG8GMNKsNpsq9LcZi3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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