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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e7af3416ce2066c1697a98b0147449728735a63e37259b4da4826f466a0106c2' 
  AND token = '7Ke6g1nFZTfoxpUP21ikEvvXdqO/BiIaOEeM2BoumoE=' 
  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"
    }
  }
}