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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '4089d66575b6960ab5d57172a85445b319056e3a43c890f60972cb057a5d9456' 
  AND token = '1ru/3kCze4W6vzPttjhDnhAka9pge1kmqT/W+0paCyE=' 
  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"
    }
  }
}