Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ffaaef4f862658041496d3e5cfffd7ac48284765b934ce86997933167adfbefb' 
  AND token = 'RiYHOfPp032l6Fm/VttaNzkxN2pxvHoCthARzpcRRzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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