Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '4fb7831538fd8e57f54ef485b6a1589bd181548fdefca9ec745d5e7f0a6cd786' 
  AND token = 'VougXPv5qwAioERhhDTCijtOx6YKn0dJ6UZKzJh64dU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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