Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ce6cddb8b8cd2a00edd11dfc74b274cfe1600e09865b8d351e3d2bb80e0d024f' 
  AND token = 'qjHDZ2RJUjPB7SYYQaNlmLSdwcmEJMooxUMLAMxGcpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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