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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad5baaf0e1cf04810fed9bf42aff71dfc82b756f25277ae9e22c61490ac2c7ef' 
  AND token = 'ly7FZXtSddMVFN3fYJ9dXmPorEUiPwnyRkVxEFq3MdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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