Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '789e90b8fd03ff0f9319bd65ef3ea76e0e5ecef1380d31a8f949df2dc4ef0919' 
  AND token = 'h9G7/fRzHxco3ItcEYY64TSMHHKviYwqpwajWXRCeAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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