Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecd710d4ebc79a5f4f71bf20a15fbefc41d3ab76b9fcc4b79c0bbe2eac959c20' 
  AND token = 'aiEUbWtwSCwqX4o6meRjqLjMfRtY+/s3n1/bNOIrdrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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