Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2dfb9605939468ca078a7299e71d1ffffa2bc2dbe2348f6217f009023af2540' 
  AND token = 'daAZXYkyij1TYi62IZPIBolW0eD1Jp8RqhVLT2MMO1g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}