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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e1ad91c3ed3143cae5634f937a9d0727b96b0799fa7806fe6a972b57da5c85d6' 
  AND token = '2OYU8CJircJ5mU7bh4tv9riX/nLydT9oX6ghdG3fRTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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