Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '242d0817720b6afa95b3ab1c57142bd06494a060620deaa09bb52d3b38561d54' 
  AND token = '/oloMz68sJkutDqGEcgJQBPCTIV4IED1x34wd25r/f0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}