Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad415fda21854f3a56516888ce84e8c7e1213668895882972f0b8b8b08cfce3e' 
  AND token = 'Igfu3HGSWyzj90eT+nFuW4jJht218i4jud38D6aQt6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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