Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '542e16c73a17d6923bbd0324e1d855ae002e8d496324b5c0fa2ec28b27f50c9b' 
  AND token = 'U8vNI2XBJq56BH9O7qKio9G2ARcMaazdCjpFWZOISHo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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