Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcf4a7465add9656008903dfa6a0a32b4173aa7798b0c3753da0c963b6ab0aec' 
  AND token = 'v3XLFsrr38VvUJqCHUenAKEAOu+xF1j1RcltdUXAglU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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