Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ff78ef3d6afb7dc55ddf808c89eb8c710ecd9998555e9dfeef96d826455451d' 
  AND token = 'sAvr2VUED3wNs23dcYt9tqavFcRy1y4aN87IxWV6eEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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