Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e83e9f2ec45f5f8b61c3f3b8be5180b2b9e6839d9cfc46093f780bae0b93bc1' 
  AND token = 'j4DTqdCTkJ1basll8gRp8ZMAM9sdB1exn49ED6WYp78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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