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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2e6b32833c27265ae0c70b0fe3650fe869771afa26c581d2494e51947906cf07' 
  AND token = 'MO/UIL/MJ3U+89uO2j3amoMVETyvC7wL94gUIv+cysg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00007

JSON explain

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