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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '491b917374c6400a372283ddf25c31c6bd4908145c6845e54662b6d6e504a19e' 
  AND token = 'rL5uMptwDHEJd9XIMxh2Z30ztcOaeUGunELbn0klkfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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