SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60c91064b972cfc9ca97a3c9d26538d50911d9bd8f7c7bf6510d4544e6e81925' 
  AND token = 'G6+km1/0Iu7pVIk2D5pK+14ZZJ9nV8VzgXjNjNNlYh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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