Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1461509a00c537b4e55c0e56e5bd85366cf991b3e6166ef132b96ff52c755ae' 
  AND token = 'mVJEWQbpQqAWVq8n2cLlF8GSoy6AGFAwF7BG1JAmW+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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