Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0477e2c32bd73051a2c5fbb5a0d4f3e9edd1ed9a121a26441fc47fb85fbed3e1' 
  AND token = 'aK99F0W4hEYOufNSJWuLT4YLRhA0xb1uXfjtrOJF9l4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}