Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fa0fca0f3f598111ff401ce4065398ab413e8236e1a798c2646f684ecfbd84e' 
  AND token = 'uLgHeSI7zRbz4JmUKs6uDcmAgOWMs8PJyUQmWlBHQRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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