Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd85612217bd423709dbb1def7bf46447cadbb0d944bc7e45097448eabb520f42' 
  AND token = '6EEeHZdgHH6yIhgh5vknNdE8hfZqUhndQVIAmigvSFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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