Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be35ce6bb0deea6c83dcee8cd8b8b2faf5c68b28043051dfeba1b780f9544fb0' 
  AND token = 'wsoY1GeAv/VUbvp0WszMa4eBi8PLQpSREOrqBKUZCQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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