Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9a861ec49fc9d89259bfcd5ae75ffa6896bea9d6f1ebb07100c6043db10230d' 
  AND token = 'L67iWGCauoWjN8UkjBR/VifKCirGGDPkEbk5sgF3BN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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