Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be6e0050c72a81d0c9ea36ec93525b82ea76810eff752de0fefd1d298e9941ff' 
  AND token = '6xNW8ECOOfleXNeDbvEffpwjfUz3C2aCZNVBbDFbuZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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