Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d55d1d865a72a9d287c64d9508b47f0c68c91968e21e9df688cd780fcbd1f95' 
  AND token = 'SNCNuquWtvX/YttCoQf6RhD3eD9MVt2Pe11qkWmcCpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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