Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6aadbdeb99351b882638fd63dbe74f4659bed7581bd1b0984f9380bd80ce02f0' 
  AND token = '9cFE2ySDurgluWEehu1FlI4Y2JvZ1GNXDMBr+kImph0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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