Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '651a95a8ced3a11da7c9f20ad26dee373a33f07ce2b4a1fec313c7b0ac6a35f2' 
  AND token = 'ZBn14/FYkNWHB9OhI6WN+11Zp0h4XkRtf3hqEc3x6U8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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