Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70ff4f4e725090b8b07d1d50ffa2a6269a566e35be1643603d9c61b53ed8dcba' 
  AND token = 'nPaJ+OeYowU40pPNRvUxLutKmsELeqnlRFj7lhYxr2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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