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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd71e12c4bd53b633b2dc5c7bb7ae4e3210c198a6d6340ac2932e85188484085e' 
  AND token = 'N0FR7h3ife8+0WPBMhIJAvdbX2L61M/dv/2qyRz7q7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}