Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba9d48ebd1ea86867374487807d4ac93080cd2037839166b30c2b2cf9d23e731' 
  AND token = '22mYgBhC2o5oB58zuk8Rd2mYkEWnJquuZ5tCdfoHCrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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