Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb14c3f13f675e7cc6fe0661832b3b00c574c47a0b5fe46740b611fee53ac993' 
  AND token = 'eHuUbE8nnh4yKvTzUP/T72oqQtee2qyQTpzNnO31he0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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