Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec2e5dd5366eb568ed6a8cf196e5d4641449526c9cb2901752415c2e84923a76' 
  AND token = '5dTeKKd00yEGSge7WvLQNqSy7xVJQsWt9kBFaSNgu5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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