Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5f9f759942fdc2c9b4e9b1c9eac5080f82f91d65bf3a5ceaa4fffd344ab34ce4' 
  AND token = 'ZlEnie7M3m29CKB0MHWevouEErtpGkJmiUOi48WTX8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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