Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3de56e17134996df189f0d1212d53d56e0f9a8ff4071c30622c333dea734f4d3' 
  AND token = 'jAmguX+Jr6cllnGiu3HQ6G9WTpADW3NQ285jCBFOiBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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