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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ad890a7d9ed2a3ea88898f922053132bb70a7836f5aeae35bc9c3add65ac56b2' 
  AND token = '/ziQUm9sBInrTr7H+H+8dHotkgqHeooS7+C5/979Fyw=' 
  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"
    }
  }
}