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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd455a758ac4076cd65b6430f9a916af9eed7d2cc9420347b4ac9a4a712146f2b' 
  AND token = 'MNgFGcJQ6b6IXFXu8hJy34RsUTRD1ZAnYp+U7IFFTFM=' 
  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"
    }
  }
}