Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53d88a46a169790385b24fe5014ba0dee2eb2a87d820cbb9238ef3c6cf8983d7' 
  AND token = 'ClgV4S2lNj1kV4+/8y8bXv9MS3qqtHJ8eyk1U5E3SoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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