Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bed3c9134d58bd7953e2e56047e95b663787a1dabc5f6bb5caec40541c6c0aed' 
  AND token = 'iP/3uDbNoZOhBD0La79/pn7hq//BU/oahrbtcay0sDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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