Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2e95a82a0c90f8647b1f97a7bc111316ca1e5547fa32035fa4af252c8fe19f9' 
  AND token = '/e5csPxaZAKzKKMNYhLFNQx7tilsinhedtYvawHrzr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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