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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8513dab99e875d14866d7bbfc615b616d43989314460d71b200d659874b6587e' 
  AND token = '6w0WGRnuMS7K6BEvg4Ws/cB7DkZ0t4RtEr8nfjRkvKE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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