Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f254bc6d1cfa5e0fe2ea63489e25c9c38b4c5564d5a76039fc21d3b99cf2ef9' 
  AND token = 'wTPd3sobE+rPae4rPhrPCjh1sTG5cYvkR3HZ+pWfYKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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