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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '62c607faac5360d563e13dbdb6285215a8a80117c70c9839d8e60680ef1dcc3b' 
  AND token = 'dhJUtxCJAKp54xMMpiyZIpQS8mMbW8rPxxz9+awIf+k=' 
  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"
    }
  }
}