Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd7cc74183b943c8ff8d62ff57b1a6831e0ec6b81d6e0bc0c1d96b2bd722dfaf' 
  AND token = 'aq40PplogWzsWZdkbtZtllYz0zjLRbnSvvpOmoYPHvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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