Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc0dd7505f099fe4a9c05cdd24d61726f6f27f4c79eb13f0151f89e7afc806dc' 
  AND token = '/SnZE0NrqVBRxREInbdcsyfjd9MIV0nKGUo7Rzvz/Fs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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