Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72ca771478e7c6ed353b8c6df0ce857cf0c7d43cd3cc25c20c558509cb25bd1e' 
  AND token = 'edC/BlxAONYErW8H5c2ZGZdoI62FKphppjtAiKU53Qs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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