Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d75cd0e2f6b40b475c31cba4883cf27d063ee581be8ccad780e8246b0c440b3' 
  AND token = 'a3BGodeQh0q4yqL9iCT5DUgNSmNMP7NU6IY/pQs6RkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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