SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0ed77f50452e308a431610d4a2c9eccef424e42435c7b29596cfca87c69d9184' 
  AND token = 'YYmREJzfsMg7ElGaWTrE1/CNCByNqcwTyh/V84GegN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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