SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'da8442e3e5a489b80c960765e36d14c5a6bc886cb42e793f76865fad0df402c9' 
  AND token = 'oL34q6ZujoV/04DUdfVP6EISGz9iQGNLhUNdhvzlyc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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