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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c82d240e1fd21661407c115b014bb40f8c95003834f0f829b9aed0e387b14606' 
  AND token = 'LxoUgP6F1gjCxhI0tsAvJMs/R+eTzC4GaDv5Nb+zZMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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