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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ed7a5aa443823c9345137cc36283fdc309a1a063e911e3296f3bb8ddbfc3cb71' 
  AND token = 'rg30LlgJ8VWH2XuqLfyYmmNsTaHpG5AueaDir19kYJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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