Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c991a52cad2285900842952afbf2bcdd92e6dd4e93ad8831ea10ce33164c193' 
  AND token = 'WzzpspAr6iwp5Q8EUFe1Wu2HU8m+dpKjT8onWDLModM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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