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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7dc844e0d1b7540b0c22d1bf6a5c82e673d55b05e77cb54c1cc081013bac7710' 
  AND token = 'tds6CAl9dNI/D9TazSpYibvjiu/OyyUkyxWHohw29UI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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