Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57c474decca14a69ae7de1d3d5714519dfcab19186f0d8486576897f5accbe44' 
  AND token = 'Dgs6RejunWjcNLomAJVkYWxjZBVCY1FppuYqTC0Ascw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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