Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9512c0c265c555a534687158c24322d4b6f7c8971b10c5ed57b35e108e48dfd' 
  AND token = 'qWAhO516U0lZPiHT/pjsvWKIG3qAtQ3QTjUtDuL+5fo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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