Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bebdd22bec87c3d6f798a8b6a71bde2e38c470ecf51cc271199baa304e8cfb6f' 
  AND token = 'xtF7vZmbSesO+dWjB7tEf5LP/B7/bLpF5hXS7pOfOLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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