Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'b35d909310eb198dc8891754fbe44c8ece03e1724499435749fb81932965828a' 
  AND token = 'nbm8DUaVIpj+Ql0yl3AyEWLhA5pEiKYZ53Xmpl3gnwo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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