Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0822c47e55d637862ac52bfdece1561016dd7b90392d909fdefa6b5a84fcc31' 
  AND token = 'z5bs8ji9XJrNB5akY/mqgTL5Cmi6c1aKgbZArxn1I6g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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