Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ebc0a3c1b903a00ecd2aa4c2b939b4b64c5ec08f83e936f5f85d68e869c66cf1' 
  AND token = 'mt8AsAy7UGOKK5ipnFqNkzT046qNFrotP6dSVi4hkf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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