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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '712931a6a235f538ce454347274938c564aa0631e0916c33ea6297a56ceface9' 
  AND token = 'EcfZaXlWjZg11dOYouARtS9JXBem/6LIkUvYuIKdKCA=' 
  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"
    }
  }
}