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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'fc5d4c1486e31f5826191d63a641c8c38f51fea58f24bf697c4965881f2453d7' 
  AND token = 'VgSdurYi1m6yVTrD0MA3fg/Fhi93NmuXsO1aeh1QrRk=' 
  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"
    }
  }
}