Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd844da9485fa472bef035146cb6b309a3dd81074d12f83bd9648b78b5879b825' 
  AND token = 'V8T+8XvbhUyikqhubW5hS0KrwJKX4Q6BA1yc5Bml1EQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}