Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '828ba86c0e3adb8c7a14ec93ccbe1e8009aaf4309613f58d3b2e212e3e3344ea' 
  AND token = 'k1+c+qaLw4KQQXGFQYqd26XePyBrkDYkFZKjX0z6yzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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