Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff0c8ab45a2a4b2d8f59aa06a5fefdec419e6804645eb0385e19365b5d059c01' 
  AND token = 'dQJlw69cpYorXDXb7jQos9wpz+C6X+a0fqGoqNTxXck=' 
  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"
    }
  }
}