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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'aceab363305ab2906abceb799cc6cb9135fb1f3d9855ddbeef8929cbc976e83d' 
  AND token = 'b6ro8L9/0QsTMEUTlp7X4XpgWJn61zO48dDsQbnvvlI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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