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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '097764f30dc4295b5813588d055616ccd51de52cd523eee01d3d6f9fb64e5098' 
  AND token = '1TZzTUcljClbWLI7LD/S1GF1AnqM7uJeVZlkAgtawt0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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