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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c0fb4424896e538d52447b5664cf350124e316e44d44b01338aecaaab924eef7' 
  AND token = 'uH9nTt0iQF3jGcBr5JfHQzOz42LokpbJDnQYAIMqpfQ=' 
  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"
    }
  }
}