Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '253982fe75ebfa287247fba44f894c59ec0d208c70b6b1fb4f28e6f99484bd91' 
  AND token = 'SZCm/WXbBu75x3wewnW0zzu/SZFiNfH48UZ0X9VEVJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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