Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02b75d94c4b624aacab6ceaca458128a5e0746943e63f904336a87cbd1ea4dce' 
  AND token = '0LaqV8NxegQh3uLzeReojYWq+iovY4fOeQ/fYRb9iTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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