Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '70e56a32fba8bf29687eec42008b06ac0a399d22adaf611ef5ef618a38bb97ee' 
  AND token = '16KQIijo5JZlvEWZz5PUkravpdtpSdJhU/QeQ+nJrE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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