Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '91bed2c4519e7272d3fb59b8b70f1a8672f9a0903edc5858c83d63bdcfedef0b' 
  AND token = 'uVKpNGHQfqKocLKATKsVIqt3LfA9ZTka/OIHWLN2uFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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