Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0f890569f192290de82ba1938c539fc1fef060db5c60fa18162e8e50dee4260' 
  AND token = 'WL4FaeQH8oug5EmYkWcH4IA7LIEW45AZdRSrmdN8+oY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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