Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aab5bcd5ca9d0d204317252dc1e411cb0a1b5311cf1a78c991b046709d3a76e3' 
  AND token = 'vzQNKAW6fj7I6jpj0xIlhUg2dtNN3izNbkSqe255faE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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