Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bba078cd9828ea56092e1816152033912355c1400a8804113d060ca256f37352' 
  AND token = 'i+24vOGkVKCg+4HnyuBPhL1SyjHuNNnl9Q6XR6y4TLM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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