Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0187b9d2a39d871dc505cbf8e4fc092e46446e2206cd495f4cf16be41cd25a26' 
  AND token = 'BugfLOvPTW0MwUEe0ZeBqCff5b2j23PWifFKHEwfIIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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