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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ae1259878edb2713b2e2a6241c055f69386e79d33e064230828c0d9a71058cb5' 
  AND token = 'zjlWVg31nKMESoCmobjneoUz19/mmi7+axGlJnpirGo=' 
  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"
    }
  }
}